Captive screw cap for cans



an -6, 1934 J. M. HOTHERSALL 1,943,314

CAPTIVE SCREW CAP FOR CANS Filed May 8, 1931 6'. ATTORNE l atented Jan.16 1934 UNITED STATES PATENT OFFICE CAPTIVE SCREW CAP FOR CANSApplication May 8, 1931. Serial No. 535,992

Claims.

The present invention relates to screw caps and nozzles for containers,and has for its object the improvement and simplification of theirconstruction. Such nozzles and caps are typically 5 provided for thepurpose of venting containers to facilitate the pouring out of theliquid content through a separate nozzle or pouring opening, to the endthat vacuum may not be created within the container by reduction of itsliquid content in the pouring. In practice, it is only necessary thatthe captive screw cap on the venting nozzle be loosened and turnedsuificiently to admit air to replace the dispensed liquid content.

The principal object of the present invention is the provision of acaptive screw cap of simplified construction and one which, while beingpermanently retained on the venting nozzle, may be readily loosened andturned to permit admission of the necessary air.

The invention has for a further object the provision of a captive screwcap of the general character above described, which maybe readilymanufactured and assembled in permanent attachment to the nozzle.

A further and important object of the invention is the provision of acaptive screw cap of easy and certain operation and which when in closedposition will tightly seal the opening through the venting nozzle.

Numerous other objects of the invention will be apparent as it is betterunderstood from the following description, which, taken in connectionwith the accompanying drawing, discloses a preferred embodiment thereof.

Referring to the drawing:

Figure 1 is a perspective view of a container having a nozzle and acaptive cap, the container and cap parts being shown in separatedposition prior to assembly;

Fig. 2 is a bottom plan view of the captive cap after it has been formedto prevent removal from the container part;

Fig. 3 is an enlarged cross sectional view through the container nozzleshowing its screw 4o -cap in closed position; and

Fig. 4 is a view similar to Fig. 3 illustrating the cap unscrewed butretained in place on the nozzle. For the purpose of illustrating theinvention,

a captive screw cap of the shape illustrated is 50 applied to a ventnozzle of a container. Such a container may be of the kind commonly usedfor olive oil, varnish, etc. and may be provided with a pouring spout inaddition to its vent nozzle, the vent when opened to atmospherepermitting 5. pouring of the contents from the container. This containercomprises a container body 11 provided with an end 12 which may besecured thereto in any suitable and well known manner, as by a doubleseam 13. The end 12 may be provided with a pouring neck or spout 14 topermit dispensing of liquid contents from the container.

The end 12 is also provided with a nozzle 15 preferably secured to theend 12 by a crimped joint 16. The nozzle 15 is formed as a cylindricalbody wall 17 in which interrupted threads 18 are pressed out or beaded,the upper end of this wall 17 being bent inwardly to provide ahorizontal shoulder 19 extending all around and enclosing a centralopening 21.

A cap 25 is provided for closing the opening 21 of the nozzle 15 andthis cap is preferably formed with a cylindrical wall 26 and animperforate end wall 27. Interrupted threads or sections of threads 28are formed in the cap by being struck inwardly at an angle as bestillustrated in Fig. 1. A sealing gasket is provided, this beingpreferably an annulus 29 of cork or other suitable material and thisgasket is preferably retained in the cap 25 as illustrated in Fig. 4.The cylindrical wall 26 of the cap 25 is extended downwardly at spacedintervals to provide lugs 31 which project beyond the remaining edge ofthe wall.

The cap 25 formed as in Fig. 1 but with its gasket 29 in position isinitially assembled on the nozzle 15, its interrupted threads 28 restingupon the threads 18 of the nozzle (Fig. 4) When in this position thelugs 31 are bent inwardly thus completing the formation of the cap andthereby providing stops 32 for preventing removal of the cap from thenozzle. As the cap 25 is rotated in one direction on the nozzle 15, itsthreads 28 cooperate with the threads 18 of the latter and draw the capdownwardly and clamp its gasket 29 on the shouldered wall 19 of thenozzle. This action seals the opening 21 against any entrance of air.The pouring spout 14 of the container may be suitably closed after thecontainer has been filled with its contents this conveniently being doneby a stopper or in other suitable manner.

When it is desired to pour the contents of the container 11 through thespout 14, the cap 25 is unscrewed by partial rotation on the nozzle 15and its threads 28 cooperating with the threads 18 of the nozzle liftthe cap removing the sealing gasket 29 from the wall 19. This partialrotation of the cap is only through a few degrees or until the lugs 32engage beneath the thread parts 18 of the nozzle 15 (Fig. 4.). Furtherrotation is then impossible, the threads of the nozzle forming anobstruction for the stop lugs 32. The vent is then open and air mayenter around and between the threads of the cap and nozzle and into thecontainer 11 permitting easy removal of its contents through the pouringspout 14, the stopper having been removed.

It is thought that the invention and many of its attendant advantageswill be understood from the foregoing description, and it will beapparent that various changes may be made in the form, construction andarrangement of the parts without departing from the spirit and scope ofthe in vention or sacrificing all of its material advantages, the formhereinbefore described being merely a preferred embodiment thereof.

I claim:

1. A container having a pouring spout, and an air-admission nozzleprovided with a captive screw cap, comprising a cylindrical body havingthreads formed in its side walls, the outer edge of said walls beingextended at spaced intervals as lugs which are adapted to be bentinwardly, after the cap has been engaged with a container, to providestops, the said nozzle being provided with threads under which saidstops engage and prevent displacement of the cap from said containerwhen it is partially unscrewed therefrom.

2. A container having a pouring spout, and an air admission nozzleprovided with a captive screw cap, comprising a cylindrical body havingan imperforate end wall and having threads .formed in its side walls,the outer edge of said walls being extended at spaced intervals as lugswhich are adapted to be bent inwardly, after the cap has been engagedwith a container, to

provide stops, the said nozzle being provided with threads under whichsaid stops engage and prevent displacement of the cap from saidcontainer when it is partially unscrewed therefrom, and a sealing mediumapplied to the said cap imperforate end waH and clamped into sealingengagement with said container by the threaded engagement between saidcontainer and cap.

3. A captive screw cap container, comprising a container part foradmission of air into said container and having threads formed therein,and a cap having a body wall provided with threads for cooperativeengagement with said container threads to efiect a closure, said capbody wall extending at spaced intervals as lugs which are adapted to bebent inwardly as stops which strike against the said container threadsand prevent removal of said cap from said container when the former isunscrewed to open the closure, said container having a pouring spout.

4. A captive screw cap container, having a pouring spout and comprisinga container part for admission of air and having threads formed therein,and a cap having a body wall provided with threads for cooperativeengagement with said container threads to effect a closure, said capbody wall having inwardly extending lugs which form stops and whichstrike against the said container threads and prevent removal of thesaid cap from said container when the former is unscrewed to open theclosure.

5. A captive screw cap container, comprising a container body, an endsecured to said body having a pouring spout, a nozzle secured to saidend and adapted to admit air into the container and having threadsformed.- therein, and a cap having a body wall provided with threads forcooperative engagement with said nozzle threads to effect a closure ofsaid container, a gasket carried by said cap and clamped on to saidnozzle when the cap is in closing position to provide an air tight seal,and lugs formed integrally with said cap for preventing removal thereoffrom said nozzle while permitting partial opening of said closure.

JOHN M. HOTHERSALL.

